Electric welder



5 Sheets-Sheet l A. HOBART ELECTRIC 'WELDER Filed July 19. 1929 INVE N'I'OR fDW/p A. HaBET,

A'TTRNEY Sept. 29, 1931.

Sept. 2.9, 1931.

E. A. HOBART ELECTRIC WELDER Filed July 19', 1929 3 Sheets-Sheet 2 'IIII" Sept. 29; 1931,. E; A. HOBART 1,825,064

ELECTRIC WELDER Filed July 19, 1929 5 sheets-sheet 3 ATTORNEY Patented Sept. 29, 1931 PATENT `Aori-rca EDWARD A.. HOBART, OF TROY, OHIO, ASSIG NOR T THE HOBALRT BROS. CO., OF TROY,

OHIO, A CORPORATION OF OHIO ELECTRIC 'WELDEB 'Application med vJuly 19, 1929. semi No. 379,374.

My invention relates to electric Welders and in articular for `the frames thereof.

It is t e object of my invention to make an all steel frame for an electric Welder, to eliminate the heavy cast iron frames heretofore made, and to permit of the assembly of the frame in successive sections, thereby economizing in weight while still maintaining magnetic qualities by reason of the construction of my frame. AI correspondingly reduce cost. I eliminate all patterns and casting stocks. I utilize in the construction of my new frame bars and flats that can be obtained from any warehouse stock. I climi--4 nate danger Jfrom broken castings in freight shi ments.

t is a further object of my invention to provide in a single unitary housing a single armature shaft for the motor, generator and exciter, thereby eliminating the extra equipment heretofore necessary when exciters were mounted upon Welders by rbolts and other attaching means which required two shafts and three or more bearings.

Itis another object ofv my invention to providel a single shaft with spaced bearings vcarried in the end frames of the Welder frame-work.

Y Itis the further object of my invention to .provide the strength of a solid structure by havingthe rolled cylinder construction, the abutting flats rolled on edge and welded to the ends thereof, giving a T construction which makes a very rigidy frame, while at the same time providing for a full ventilation of the entire structure by reason of the open frame-work Whichjoins the two rolled steel cylinders.

The general construction is of the tele-v scopic type with only one Iioint so that perfect alignment is maintained. Thus my object is accomplished of being able to chuck either half in a lathe and bore the bearing seat and stator hou/sing or direct current yoke all at the same time, thereby insuring perfect alignment of these three parts.. I then join the two halves of the structure in the middle, giving a perfect alignment from end to end.

It is my further object to provide for the 18 may be of any character, alternate conseparation of these two halves at thecenter and for the placing of a large diameter fan for ventilation at this point.

Referring to the drawings, Figure 1 is `a section through the structure of the frame without the generator motor and exciter.

Figure 2 is a section on the line 2-2 of Figure 1.

Figure 3 is a section on the line 3-3 of Figure 1.

Figure 4 is a Figure 1.

Figure 5 is a section on the line 5-5 of Figure 1.

Figure 6 is a section through the com` pleted apparatus showing the method of installation of the central ventilation fan, motor, generator and exciter.

Referring to the drawings in detail, 1 indicates the rear wheels mounted on the rear axle 2, and 3 the forward wheels mounted on the forward axle 4. Brackets 5 and 6 respectively support the rear and front ends of the Welder frame hereinbefore described. The motor section is comprised of a rolled steel drum 7 in which is pressed a heavy steel ring 8, welded at 9 to the ring 7. This ring` 7 has Welded on either end thereof at right angles thereto the rings 10 and 11. The welds'are indicated at 12. vThe rings 10 and 11 project beyond the periphery of the drum 7 and form With it a T-shaped structure.

On 4the ring 11 at equal points of the compass are Welded as at 13 the inwardly converging channel irons 11.1L which are turned' towards each other as at 15 and welded to a bearing support 16, as indicated at 17.4 This bearing support for the shaft section' on the line 4-4 of structions being indicated in Figures 1 and 6.

Turning to the right hand side of the machine where the generator and exciter are housed, I provide a rolled steel drum 19 n the interior of which there are mounted 1 spaced position rails 20 that are welded as at 21 to the interior of the drum 19. The ends 22 of these rails are spaced from the ends of the steel drum 19 and from the end 1 rings 23 and 24 which are welded thereto as at 25 and 26, my purpose being to provide a support for the generator stator but to leave spaces 27 for the free circulation of air for ventilation purposes. l

Channel members 28 which inwardly converge are welded as at 28 to the ring 24 and have their inwardly extending ends 30 welded at 3l to the bearing v32 which supports the other end of the shaft 18.

The generator and motor halves are joined together by a plurality of spaced members 33 which are welded to the rings 10 and 23 at 34 and 35 respectively.

Spaces 36 areleft between the plates 33 for the free circulation of air. This air is caused to circulate by the fan 37 which is mounted on'the shaft 184 between thel motor 38 and the generator 39.

The exciter is generally designated 40.

In Figure 6 ball bearings 41 and 42 are Drovidedfor supporting the shaft 18. The

box for the control mechanism is mounted on the frame at 43.

'It will be understood that I desire to comprehend within my invention and within the scope of my claims such modifications as may be fairly comprehended within such claims and invention due to necessary modifications to adapt my invention tovarying conditions of use and to varying purposes.

Having thus fully described by invention, what I claim as new and desire to secure b Letters Patent, is:

1. In a welder frame, in combination with an armature shaft, a drum generator section, a drum motor section, spaced bars interconnecting said sections andwelded steel frames mounted on the opposite ends of said sectionsV for supporting said armature shaft, a generator means, an exciter and a motor. all mounted upon such shaft within said frame.

2. In a welder frame. in combination with an armature shaft, a drum generator section, a drum motor section, spaced bars interconnecting said sections and welded steel frames mounted on the opposite ends of said sec,- tions for supporting said armature shaft, a generator means, an exciter and a motor, all mounted upon such shaft within said frame, and means to support the generator` stator away from its drumy sectionv and the sides thereof to insure ventilation.

3. In a Welder frame, in combination with an armature shaft, spaced steel drums, rings welded to the ends of said drums projecting on either side thereof, longitudinally disposed spaced bars welded at their ends to the adjacent rings and channel iron cage members welded to the other rings on said drums to form bearing supports for said armature shaft.' l

4. In a Welder frame, in combination with an armature shaft, spaced steel drums, rings welded to the ends of said drums projecting on either side thereof, longitudinally dison either side thereof, longitudinally disposed spaced bars welded at their ends to the adjacent rings and channel iron cage members welded to the other rings on said drums to form bearing support-sfor said armature shaft, rails Welded .within the generator drum circle to the longitudinal axis thereof but spaced at the ends from the rings on the drum.

6. In a Welder frame, in combination with an armature shaft, spaced steel drums, rings welded to the ends of said drums projecting on either side thereof, longitudinally disposed spaced bars welded at their ends to the adjacent rings and channel iron cage members welded to the other rings on said drums to form bearing supports for said armature shaft, rails welded within the generator drum circle tothe longitudinal axis thereof,vbut spaced at the ends from the rings on the drum, and a steel stator ring for the motor mounted within the motor drum; l

7. In a Welder, a welded steel frame, a shaft mounted in bearings on either end thereof and la generator, motor and exciter utilizing said shaft 'as a common armature shaft, and all of which are mounted within said -frame between the bearing supports for said shaft.

8. In a welder, a welded steel frame, a shaft 'mounted in bearings on either end thereof and a generator, motor and exciter utilizing said shaft as a common `armature shaft. and all of which are mounted within said frame between the bearing supports for said shaft, said frame having openwork at either end and in the center thereof.

9. In a welder. a welded steel frame, a shaft mounted in bearings on either end thereof and a generator, motor and exciterl utilizing said shaft as a common armature shaft. and all of which are mounted within said frame between the bearing supports for said shaft. said frame having openwork at either end and the center thereof. and a fan member mounted on the center of said arma ture shaft for circulating air through said frame.

10. In a Welder frame, in combination with an armature shaft. spaced drum supports for a generator and a motor,

an open framework welded thereto to connect said` drums, open Iramework on opposite ends of said drums welded thereto havin bearings for supporting said armature sha and exciter, generator and motor mounted on said shaft, said exciter being mounted within one of the open end frameworks, and said motor and generator being mounted Withinl said res ective drums. Y

n testimony whereof, I aix my signature.

EDWARD A. HOBART. 

